Resin glycosides structure elucidation

The main approaches for the structure elucidation of the resin glycosides involve the use of degradative chemical reactions or the application of high-resolution spectroscopic and spectrometric techniques and combining both has proven to be the best way for total characterization of these complex molecules. 

Complete structure elucidation of individual resin glycoside constituents is now achieved readily by the use of a combination of high-resolution mass spectrometry and NMR spectroscopy. These methods are applicable to the isolated natural products or to their peracetylated and methylated derivatives. 

Noda N, Ono M, Miyahara K, Kawasaki T, Okabe M (1987) Resin Glycosides. I. Isolation and Structure Elucidation of Orizabin-I, II, III and IV, Genuine Resin Glycosides from the Root of Ipomoea orizabensis. Tetrahedron 43 3889... 

However, to date reports on structural elucidations of resin glycosides are confined to 34 species belonging to six genera, altogether listed in Table 8.2 together with the respective authorities for the species and the phytochemical references Ipomoea (23 spp.), Merremia (3), Convolvulus (3), Operculina (2) Cuscuta (2), Calystegia (1). The vast majority of these plants are of tropical origin. 

Table 8.2 Occurrence of structurally (at least almost completely) elucidated resin glycosides and glycosidic acids, respectively, in the Convolvulaceae family Convolvulaceae-based trivial names of hvdroxv fatty acids (HFAl ... 

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